Linear motion device comprising a deflection assembly having a single deflection passage

Abstract

A linear motion device has a first assembly and a second assembly which is linearly movable relative to the first assembly, in which at least one first rolling surface which extends in a longitudinal direction is provided on the first assembly, the first rolling surface being located opposite a second rolling surface provided on the second assembly, and in which a row of rolling elements is located between the first and second rolling surfaces, and in which a return passage that is substantially parallel to the first rolling surface is provided in the first assembly, the return passage being connected at either end via a curved deflection passage to the first rolling surface such that rolling elements are transferred, thereby enabling the rolling elements to circulate endlessly, and in which the first assembly includes at least one deflection assembly that may be installed as a whole, and that includes a single deflection passage, and the return passage is provided directly and completely in a separate first body of the first assembly, and the deflection assembly is fastened to the first body via a single, separate fastening bolt that is installable from one side, the fastening bolt being located in the region of the center of curvature of the assigned, curved deflection passage.

1. A linear motion device, comprising a first assembly and a second assembly which is linearly movable relative to the first assembly, in which at least one first rolling surface which extends in a longitudinal direction is provided on the first assembly, the first rolling surface being located opposite a second rolling surface provided on the second assembly, and in which a row of rolling elements is located between the first rolling surface and the second rolling surface, and in which a return passage that is substantially parallel to the first rolling surface is provided in the first assembly, the return passage being connected at either end via a curved deflection passage to the first rolling surface such that the rolling elements are transferred, thereby enabling the rolling elements to circulate endlessly, and in which the first assembly includes at least one deflection assembly that is installed as a whole, and that includes a single deflection passage, wherein the return passage is provided directly and completely in a separate first body of the first assembly, and the deflection assembly is fastened to the first body via a single, separate fastening bolt that is installable via one side, the fastening bolt being located in a region of a center of curvature of the assigned, curved deflection passage. 
     
     
       2. The linear motion device as recited in  claim 1 , wherein the deflection assembly includes a first deflection part and a second deflection part, a parting plane of which is defined by a midpoint trajectory of the rolling elements in the deflection passage; the fastening bolt extends through both deflection parts and is situated perpendicularly to the parting plane. 
     
     
       3. The linear motion device as recited in  claim 2 , wherein the first rolling surface is provided on a separate, first rolling surface part that is supported on the first body, the first rolling surface part extending in the longitudinal direction beyond the first body and thereby engaging in the first deflection part and the assigned second deflection part. 
     
     
       4. The linear motion device as recited in  claim 3 , wherein the rolling elements are balls, and the first rolling surface part has a V-shaped cross section that includes a first V-leg and a second V-leg, the first V-leg engaging in the first deflection part, and the second V-leg engaging in the second deflection part. 
     
     
       5. The linear motion device as recited in  claim 2 , wherein at least one separate, first lubricating oil storage body is provided that has a constant cross-sectional shape, and is enclosed by the first deflection part and the assigned second deflection part, the first lubricating oil storage body extending via at least one application section into the assigned deflection passage, thereby enabling it to establish lubricating contact to the rolling elements. 
     
     
       6. The linear motion device as recited in  claim 5 , wherein the first lubricating oil storage body is directly connected to a separate, second lubricating oil storage body in a lubricant-transferring manner, the second lubricant storage body having a constant cross-sectional shape that is adapted to a cross-sectional shape of the second rolling surface, and that touches the second rolling surface; cross-sectional planes of the first and second lubricating oil storage bodies are oriented perpendicularly to one another. 
     
     
       7. The linear motion device as recited in  claim 6 , wherein a stripper plate is formed as a single piece exclusively with the first deflection part, and is situated with equidistant clearance from the second rolling surface, the stripper plate supporting the second lubricating oil storage body against bending. 
     
     
       8. The linear motion device as recited in  claim 6 , wherein a lifting projection is formed as a single piece exclusively with the first deflection part, on which the rolling elements are lifted off of the second rolling surface and transferred to the assigned deflection passage. 
     
     
       9. The linear motion device as recited in  claim 1 , wherein the deflection assembly is accommodated in a deflection recess located on a side of the first body, the deflection recess being adapted to the deflection assembly such that the deflection assembly is substantially entirely prevented from rotating. 
     
     
       10. The linear motion device as recited in  claim 1 , wherein a separate transfer part engages in the curved deflection passage and in the adjacent return passage, the transfer part including a deformable passage that connects the deflection passage to the return passage.